Answers.com had the following info for a similar question.
Delphian Arms serial #165389
Made by Crescent Fire Arms Co.
Hammerless dbl bbl 1903-1930
Hammer type dbl bbl 1892-1913
This is probably as good an answer as you will be able to get.This company has been out of business for many years and the original records are not available(to my knowledge).Crescent also manufactured and sold guns using over 100 different trade and company names during their career.I hope this helps.
